Gas-stove.



E. J. ALLEN.

GAS STOVE.

APPLICATION FILED MAR. 26. I914. 1 9 IMAM. Patented Nov. 16, 1915.

Y Y 2 SHEETS-SHEET 1.

SECTION 5-5 SECTIONA -A- FIG; 'FIGZ. FIGS U o L l I f I P J I I Y J K 1 SLIDING BLOCK i ym. 1h: PLUG EIGS 5. 1. ALLEN.

GAS STOVE.

APPUCATION mm MAR. 26, 1914. r

Patented Nov. 16, 1915,

2 $HEETS-SHEET 2- FATNT FTQ.

l ERNEST J. ALLEN, 0F ALBANY, NEW YORK, ASSIGNOR TO RA'IHBO'NE, SARID &

COMPANY, OF ALBANY, NEW YORK, A CORPORATION.

e-As-s'rovn.

To all whom it may concern.

Be it known that I, ERNEs'r J. ALLEN, a subject of King George V of'Great Britain, residing at the city of Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Gas-Stoves,of which the following is a specification.

My invention relates to gas stoves, and the object'of my invention is to provide a means for supplying gas to a burner, properly mixed with air and in such quantities as is desired, with means for providing the same proportionate amount of air and gas regardless of the quantity of the mixed fluid delivered for burning; together with such H the size of the slotted opening, M, in the elements and combinations as are hereinafter more particularly set forth and claimed. I accomplish these objects by means of the mechanism illustrated in the accompanying .drawings, in which:

Figure 1 is a section of the mixing valve. Fig. 2 is a section along the. lines, AA, on Fig. 1. Fig. 3 is a section along the'lines, BB, on Fig. 1. Fig. 4 is an elevation of I the valve plug. Fig. 5 is a side view of the valve plug. Fig. 6 is an end view of the sliding block. Fig. 7 is a plan of the sliding block. Fig. 8 is a plan of the adjusting screw. Fig. 9 is a plan of the manifold. Fig. 10 is a section-along the lines, AA,

on Fig. 9. Fig. 11 is an elevation-of the apparatus assembled and ready for use.

Fig. 12 is a vertical section through thediaphragm. 16. Fig. 13 is a cross section through the diaphragm,16.

Similar letters refer to similar parts throughout the several views.

The manifold comprises a casting, vided with two disconnectedchambers, B and C. The chamber, G, contains airand the chamber, B, gas.

gas pipe, E, conducts gas to the chamber, B'. From the chamber, B, the gas escapes through the orifice,F, into the opening, G,

in the mixing valve, V, and through thestem, K, carrying a plug, L, thereon into which is cut a slotted opening, M, which during the rotation of the valve stem, K, may be brought to register-with the gas inlet, G, permitting gas to flow through the Specification of Letters Patent.

A, pro- The air enters the chamber, C,.through the pipe, D, and the Patented Nov. 16, 1915.

Application fild March 26, 1914. Serial N 0'. 827,471.

opening in the plug into the mixing chamber, 1n such quantity as is desired, be-

cause the slotted opening may be brought by the rotation of the plug so that a very small orifice-is presented for the passage of gas; or a larger orifice is so presented, depending upon the desire of the operator. The valve stem, K, also carries the bifurcatedplu'g, 0, through which is the passageway, U, so arranged in reference to the air inlet, J, that the amount of air which may be allowed to enter the mixing chamber, N, may be regulated by the rotation of the stem and plug. 1

' The size of the space, P, through the bifurcated plug, 0, is such in proportion to plug, L, that the proportion of the quantity of gas and air admitted into themixing chamber, N, will be the same whether the quantity of each is very large or very minute. But there is always some air admitted through the opening, U,to the mixing chamber, N, as is shown in Fig. 1, which illustrates the position of the valve when the gas is entirely out ofi', for a, portion of the opening, U, registers with the chamber, B, and a small quantity of air flows into the burner, 14, which prevents back-fir- The function of the opening, U, is

ing. to provide for a small quantity of air being carried intoitheimixing chamber just previous to'thestoppin'g'of the flow of gas and thus maintaining a constant flow through the burner, purging the burner of explosive supplying air after the gas has been turnedofi', the gas is driven out of the burner to the flame and prevents the'interior explosion.

For the purpose of adjusting the valve stem, K, so that the plugs, L and 0, thereon may be adapted for a very rich gas, or

gas that is not so rich I place a sliding 7 block, S, adapted to reciprocate between the bifurcations in the, space, P, of the plug, 0, and adjusted by means of the screw, T, so that the opening through the bifurcated plug,O, may be partly closed but not suiiiciently to close the passageway, U when deslred. p

From the mixing chamber. N, the gas escapes through a suitable opening, W, to burner, 14, shown in Fig. 11. A handle, Y,

attachedto-the stem, K, is a convenient means for rotating the stem. The finger, X,

on the handle may be arranged to register I with the table, Z, upon which suitable figures or 'letters (not-shown) maybe placed for the purpose of indicating what the degree of the gas and air openings may be, which openings have been caused by the rotation of the valve stem, and which is shown by the position'ofthe finger. I N For the purposeof maintaining substan tiallythe. same proportion of airto gas'when the-pressure of gas varies, I have provided 'anautomatic means for opening andclosingthe 'valve in' the air supply ,pipe, D. I have .providedv a branch, 15,-leading from v the gas supply pipe," E,,,to,a diaphragm'cas- ,ing, 16; lVithin the casing, 16, is an ordinary diaphragm, 25, one side of which is acted upon by thegas delivered through the branch, l-5, For the purpose of carrying the air from the air chamber, C, -to .the dia] phragm, maintaining a pressure on the diaphragm equal to that of the'pressurefin the chamber, 0-, the pipe, 19, communicates with the air chamber, C, in the manifold so that the air flowing through the pipe, 19, im-

pinges upon thesideofthe diaphragm op-- posite that'upon-which the gas impinges.

The butterfly 'valve,.17 is connected to they diaphragm 25,by means of the link, '26, crank, 27, and rocking-arm, 28, and so arranged 'that the pressure of the gas on the diaphragm will open the valve, 17 ,the' degree of theopening depending upon theidegree of Jpressure of the gas. The valve, 17, is so adjusted thatthe proper amount of air to gas will be furnished because ofthe effectof the gas upon the butterfiyval-ve. Thus witha'gas of greater pressure the valve is opened wider thanwhen a gas of lower pressure isifun.

ni'shed, andtherefore more air is admitted to-the airchamber thence to the mixingchamber. Gaspressure from the main opens fold equals .the gas valve, 17, until air pressure from the manipressure. The pressures are thus balanced. I

to secureby' Letters"Patent is:

.In a gas burner, a valve'comprisin'g a casting provided with a mixing, chamber; a valve stem; a plug thereon provided with a ing int he casting with whichsaid restricted opening inthe plug" may register when the of said plug in a plane at right angles to- NVhat I claim as my invention and .desi'r restricted opening in a plane at right angles to theaxis'of the Valve stem; an openstem is rotated, a bifurcated plug on'said valve stem apassagewayl through the legs the axis of the plug, said passageway adapted to register with an opening in the ,valve casing during the rotation of the stem; a sliding block adapted toreciprocate betweenthe legs of said plug; and means for regulatingthe position of said block between the legs on the plug.

2. In a gas burner, a mixing valve; means for conveying gas and means forc'onveying air thereto; means for automatically apporadmission to the mixing chamber; with a tioning thevolume of air to that of gas in its means for causing air to pass into the burner after the gas has been cut off.

8. The combination of; a manifold, comprising two non-communicating chambers;

means for conveying gas to one of said chambersy'means for conveying air to the other chamber;'w1th a gas burner, and connected therewith a mixing valve provided with-a mixing chamber and a valve stem; and meanskcarriedby. said valve stem for mamtainingzthe admission of airjand gas from the manifold to .the'mixing chamber in the same proportion ofgas to air,-regardless of the quantity of either, so'that' by the .movement'of the valve stem to cause an 1ncr'eased flow of gas, a proper amount of air will be supplied without any adjustment or' further manipulation of the apparatus by r the user.-

l. Ina gas burner, a mixing valve, com 1 prising a mixing chamber; a valve stem;

meansconnected with and operated sir'nul;

chamber in certain predetermined propor tions; with means also connected with. and v operated by'said valve stemfor eausingthedelivery eta-small quantityof-air into the mixing'chamber just prev'ious to the stop- ;tation thereof,

5. In a gas burner, a a mixing chamber and a valve stem, said .valve stem providedjwith' a'res'tricted opening in a planeat right angles to the axis. 'of the valve stem; a'bifurcated plug on said valve stem and a passageway through the.

plane at right angles "to the axis of the plug. I

legs of said plug in a 9 5 .taneously with said valve stem for provid I 'ing for the gas and alr to enter the mixing ping of the flow of gas, thus ,maintainin'ga flow .through the burner, purging the burner of explosive gas'and preventing back-fire;

with means forrotatinglsaid valve stem, and means'for indicating the degree-of rovalve rovided with 

